body {
  width: 100%;
  min-width: 320px;
  max-width: 640px;
  font-family: -apple-system, Helvetica, sans-serif;
  color: #666;
  font-size: 14px;
  line-height: 1.5;
  margin: 0 auto;
}

div {
  box-sizing: border-box;
}
.app {
  height: 45px;
}

.app ul {
  padding: 0;
  margin: 0;
}

.app ul li {
  float: left;
  height: 45px;
  text-align: center;
  line-height: 45px;
  color: #ffff;
  list-style: none;
  background-color: #bd2445;
}

.app ul li:nth-child(1) {
  width: 8%;
}

.app ul li:nth-child(1) img {
  width: 10px;
}

.app ul li:nth-child(2) {
  width: 10%;
}

.app ul li:nth-child(2) img {
  width: 30px;
  vertical-align: middle;
}

.app ul li:nth-child(3) {
  width: 57%;
}

.app ul li:nth-child(4) {
  width: 25%;
  background-color: #e07866;
}

.serach-wrap {
  position: fixed;
  width: 100%;
  height: 44px;
  overflow: hidden;
  min-width: 320px;
  max-width: 640px;
  z-index: 99;
  background-color: red;
}

.serach-btn {
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 44px;
  /* background-color: pink; */
}

.serach-btn::before {
  position: absolute;
  display: block;
  top: 0;
  content: "";
  width: 20px;
  height: 18px;
  background: url(../images/s-btn.png) no-repeat;
  background-size: 20px 18px;
  margin: 14px 0 0 15px;
}

.sou {
  position: absolute;
  top: 1px;
  left: 40px;
  width: 18px;
  height: 15px;
  background: url(../images/jd-sprites.png) no-repeat -81px 0;
  background-size: 200px auto;
}

.search {
  position: relative;
  overflow: hidden;
  height: 30px;
  margin: 0 50px;
  border-radius: 15px;
  background-color: #ffff;
  margin-top: 7px;
}

.icon-jd {
  width: 20px;
  height: 15px;
  position: absolute;
  left: 12px;
  top: 7px;
  background: url(../images/jd.png) no-repeat;
  background-size: 20px 15px;
}

.search::after {
  display: block;
  content: "";
  left: 10px;
  top: 0px;
  width: 1px;
  height: 16px;
  margin-top: 6px;
  margin-left: 39px;
  background-color: rgb(116, 85, 85);
}

.serach-login {
  position: absolute;
  right: 0;
  top: 0;
  width: 40px;
  height: 44px;
  font-size: 16px;
  color: #fff;
  text-align: center left;
  line-height: 44px;
}

.slider img {
  width: 100%;
  vertical-align: middle;
}
.pic {
  float: left;
  width: 33.33%;
}

.pic img {
  width: 100%;
}
/* .img{
 width:40px;
 height: 40px;
} */
.footer {
  display: flex;
  position: fixed;
  bottom: 0;
  width: 100%;
  height: 60px;
  background-color: ivory;
  justify-content: center;
  align-items: center;
}
.footer div{
  text-align: center;
  flex: 1;
}
.div {
  box-sizing: border-box;
}